Shouldn't the chapter title be cased like "AVs" rather than "AVS?" Because "AV" stands for "adult video" and the final S is just pluralizing it. (Unless they were watching videos of the American Viola Society's recitals?)
Looks like I was correct to assume that Kyouko was a former AV actress or at least it is strongly implied that she is. She sure loves to tease him even if it ends in him passing out. Thanks for the translations.
this chapter reminded me of that one manga of that guy watching av with a girl from his class in his room iirc, whatever happened to that manga? did the team scanning it drop it